Removing a post embedded in a tooth
Patent 5173049 Issued on December 22, 1992. Estimated Expiration Date: 
March 5, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 5, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDevice for preventing tooth decay by laser beam irradiation and method of preventing tooth decay by use of the same Tool and method for removing a parted endodontic file Dental laser method Root canal sterilization method Patent #: 4979900 InventorAssigneeApplicationNo. 846662 filed on 03/05/1992US Classes:433/215, METHOD OR MATERIAL FOR TESTING, TREATING, RESTORING, OR REMOVING NATURAL TEETH433/224, Endodontic433/229MISCELLANEOUSExaminersPrimary: Hirsch, Paul J.Assistant: Cherichetti, Cindy A. Attorney, Agent or FirmInternational ClassesA61C 005/00A61C 005/02 AbstractA process for cleaning and/or shaping passages, comprising providing an optical fiber having a diameter sufficiently small to be introduced into the passage and having a free end provided with a radiation focussing element; introducing the free end of the fiber into the passage so that the focal point defined by the radiation focussing element is located adjacent the region to be cleaned or shaped; providing a liquid in the passage at the location of the focal point of the radiation focussing element; and supplying pulses of laser radiation to the fiber so that the radiation exits the fiber via the free end to provoke a cavitation of vapor at the interior of the irrigating liquid. | |
